Scientists have launched an urgent call for research to establish the health and environmental risks of particles produced by tires, which are the “main contributor to microplastics”.

A new study has found that tire particles (TP) make up almost a third of all microplastics and researchers say they could cause bigger problems because they differ in size, chemical complexity and behavior in ecosystems.

Henry Obanya, from the Institute of Marine Science and a member of the Revolution Plastics Institute at the University of Portsmouth, said: “Tyre particles are classified as microplastics, but they contain hundreds of unknown chemicals, many of which are infiltrate the environment and pose unknown problems. risks.

“Our study calls for TPs to be separated from traditional microplastics and recognized as a unique threat to the environment and public health. We need targeted research to understand their pathways and impact.

He said TPs contain many additives, such as polyaromatic hydrocarbons, heavy metals and stabilizing chemicals, which make them chemically unique and potentially harmful as they degrade in the environment.

He added that while traditional microplastics are typically smaller than 5mm, tire particles (TPs) can be larger and disperse into ecosystems through road runoff and wind, ultimately settling in roads. waterways, soil and even enter food chains.

The research, which involved scientists from the UK, US, Norway, Australia, South Korea, Finland, Austria, China and Canada, made recommendations for of an intergovernmental scientific and policy group on chemicals, waste and pollution to combat TPs globally. ladder.

Mr. Obanya added: “This study is a clear call for coordinated international efforts.

“By recognizing PTs as a distinct environmental threat, we can conduct meaningful research, guide policy, and ultimately work toward a healthier, more sustainable world.” »